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Leading Trade Fair for Powder & Bulk Solids Processing and Analytics

30.08. - 01.09.2022 // Nuremberg, Germany

New Date: POWTECH 2022 from 30 August - 01 September 2022

+++ The entries in the exhibitor & product database correspond to the registration status for POWTECH 2019. +++

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Exhibitors & Products POWTECH 2019




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VSFJ series turbo air classifier is produced by Dongguan Vsunny Machinery Co., Ltd. to solve the problems of poor classification effects and low yield of domestic ordinary classifiers. Learning the design from German Alpine and Ecutec S.L., combined with its self-produced VSLM series ultrafine vertical mill classifying technology, the company has developed an industrial leading turbo-type air classifier which can sort 1.5~30μm, and its 2μm content can reach up to 80%.

VSFJ series turbo air classifier has a wide range of applications, such as ground calcium carbonate, light calcium carbonate, talcum, barium sulfate, wollastonite, pyrophyllite, dolomite, graphite, kaolin, brucite, soapstone and other types of non-metallic mineral powder.

Working Principle

The feed screw conveyor will put the powder stored in the hopper in the wind transport duct at a constant flow rate by a computer, and mix the powder with the main stream before entering into the classifier. The main gas stream full of powder first enters into the volute chamber at the bottom of the classifier, and uses both the vortex force of the main stream in the volute chamber and the centrifugal force generated by the rising secondary air in the pre-classifying chamber to make pre-classifying. Coarse particles are first sorted out.

Coarse particles fall from the bottom of the classifier, which are the low-end powder after classification. The secondary air stream sucks from the bottom of the pre-classification chamber and picks the remaining fine powder from the coarse one. The remaining airstream containing finer particles are brought into the final classification zone, in which the outlet is equipped with an automatic classifier having three or more classification rollers for final classification. In this classification zone, the powder is under the action of the centrifugal force, fluid resistance, and its own gravity. Powder which is greater than the convergent point will be sent back to the pre-classification chamber, while powder which is smaller than the convergent point will be brought out of the classifier along the airstream. The blower brings the fine powder from the classifier and becomes the finished product collected by the jet bag filter machine. Part of the gas will be discharged from the exhaust pipe of the device into the atmosphere, in order to maintain the classifying system’s temperature above the dew point in the entire plant operation, whilst the remaining air is recycled as the main airstream. Collected by the bag filter, fine powder and coarse powder in the pre-classification chamber will be delivered to the designated warehouse by the pneumatic conveying system, according to their specifications. The Packing Machine is disposed below the finished product warehouse.

Technology advantages of VSFJ Series Turbo Air classifier

1.Accurate particle size distribution. Maintain a narrow particle size distribution through adjustment and control operations according to the convergent point required.

2.The product is stable, continuous and reliable. The fineness of the product can be adjusted freely by adjusting the rotating speed of the classifying wheel through frequency converter or adjusting the opening of the air valve. The adjusting of the product variety is easy and convenient, continuous and stable.

3.Support large scale of industrial classification production. Designed with mighty vortex classification principle and the classifying impeller located horizontally with single impeller or multiple impellers structure, the classifier is particularly suitable for large-scale industrial classification production of 400~8000 mesh micro powder.

4.Independent system can be established for independent purpose. Suitable for directly connecting various grinding equipment to form a closed-circuit continuous ultrafine production system.

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